$('.icon').on('click',function(){
    history.go(-1);
})

//点击几秒后跳转
$(".icon1").on("click", function () {
    // 显示隐藏
    var _success = document.querySelector(".success");
    _success.style.display = "block";
    // 打卡跳转3秒
    setTimeout(function () {
      location.href = "../text2/registrationform.html";
    }, 2000);
  });